Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi van bon snippets" » "khoi can bon snippets", "khoi va bon snippets", "thoai van bon snippets", "khoi van ban snippets", "khoi van dong snippets", "khoi van cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("khoi van bon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoi van bon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi van bon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi van bon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.